Mayor Bloomberg and his staffers are getting ready to move operations to the city’s new emergency bunker in Brooklyn to give it a test run – and give his City Hall digs a minor face lift in the process.

“It’ll, No. 1, show everybody that there is another part of this city, [and] No. 2, it’ll show that if we had to evacuate City Hall, we’ve taken the steps and we’ve practiced,” Bloomberg said.

The City Hall “bullpen” will get an electrical upgrade, along with new carpet and a paint job.